A)Activation of helper T cells and antibody production. B)Activation of memory CD8⁺ T cells and antibody production. C)Activation of naïve CD4⁺ T cells and memory CD8⁺ T cells. D)Activation of memory CD4⁺ T cell and antibody production. E)Activation of naïve CD4⁺ T cells and memory CD4⁺ T cells.